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Finding the Fourth Proportional to 21,385.77, 29,505.51 and 11,952.51

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Solution

The fourth proportional to 21,385.77, 29,505.51 and 11,952.51 is: 16,490.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,385.77 : 29,505.51 = 11,952.51 : x
  2. Step 2: Convert to fraction form
    21,385.77/29,505.51 = 11,952.51/x
  3. Step 3: Cross multiply
    21,385.77x = 29,505.51 × 11,952.51
  4. Step 4: Simplify right side
    21,385.77x = 352,664,903.33
  5. Step 5: Solve for x
    x = 352,664,903.33/21,385.77
  6. Step 6: Final answer
    x = 16,490.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.